Interfaces and receptions - what sends the signal?

[bknoth2]

I understand that, in SysML, a reception in an interface shows that the entity that supports the interface will accept asynchronous signals of the designated type (eg. IMU_Measurement in the image below). Is there a way to show that an interface will send those messages? (What's the opposite of a reception?). Do I have the wrong understanding?



Thanks
Bruce